I have a 10 gal fairly heavily planted with fairly high light plants, to low light plants, all under the 28 watt coralife fixture with the freshwater planted bulbs. i dose the seachem line, including excel. everything is doing great.
Don't strive for perfection initially, but do enough research so you feel comfortable with your choices. Don't trust chain pet stores, and do your own research!
10 gallon open top betta bachelor pad.